9953687857 has 2 divisors, whose sum is σ = 9953687858. Its totient is φ = 9953687856.

The previous prime is 9953687839. The next prime is 9953687879. The reversal of 9953687857 is 7587863599.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6646977841 + 3306710016 = 81529^2 + 57504^2 .

It is a cyclic number.

It is not a de Polignac number, because 9953687857 - 2⁷ = 9953687729 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9953687792 and 9953687801.

It is not a weakly prime, because it can be changed into another prime (9953687837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4976843928 + 4976843929.

It is an arithmetic number, because the mean of its divisors is an integer number (4976843929).

Almost surely, 2^9953687857 is an apocalyptic number.

It is an amenable number.

9953687857 is a deficient number, since it is larger than the sum of its proper divisors (1).

9953687857 is an equidigital number, since it uses as much as digits as its factorization.

9953687857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 114307200, while the sum is 67.

The square root of 9953687857 is about 99768.1705605550. The cubic root of 9953687857 is about 2151.1036595738.

The spelling of 9953687857 in words is "nine billion, nine hundred fifty-three million, six hundred eighty-seven thousand, eight hundred fifty-seven".